Finding the Fourth Proportional to 22,216.20, 30,659.18 and 12,145.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,216.20 : 30,659.18 = 12,145.31 : x
2. Step 2: Convert to fraction form
   22,216.20/30,659.18 = 12,145.31/x
3. Step 3: Cross multiply
   22,216.20x = 30,659.18 × 12,145.31
4. Step 4: Simplify right side
   22,216.20x = 372,365,261.37
5. Step 5: Solve for x
   x = 372,365,261.37/22,216.20
6. Step 6: Final answer
   x = 16,760.98